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Related Questions:

re: 2000 Chevy astro van delco radio unlock code 682695.
Good luck and please flag if HELPFUL". Thanks!
How to Unlock a Delco Radio - Instructions

1) Obtain the six-digit dealer code - yours is above. ( this doesn't apply: Contact your local GM dealer. If you explain the situation, most will provide the code to you. If they are not willing to provide the code, contact other GM dealers until you find one that will help you

2) Turn the ignition key to the "ON" position, without turning the engine over. Hold the preset buttons "2" and "3" for 10 seconds. The radio will display a three-digit code. Write this number down and then quickly press the "AM/FM" button. Three more digits will be displayed. These six numbers are the serial code for your radio.

3) Call the GM assistance hotline at 800-537-5140. Follow the prompts and select the brand of your vehicle. Enter the six-digit dealer code and then enter the six-digit radio serial code. The automated system will provide you with a four-digit code to unlock your radio.

4) With the ignition on, use the "Hour" button on your radio to input the first two numbers of the four-digit code. Use the "Minute" button to input the last two digits. Press "AM/FM" to set the code. The radio is now unlocked and ready for use.

hi
Your phone’s four-digit unlock code is
originally set to 1234. The six-digit security
code is originally set to 000000. If your
service provider didn’t change these codes,
you should change them:
If you forget your unlock code: At the
Enter Unlock Code prompt, try entering 1234 or the
last four digits of your phone number. If that
doesn’t work, press M and enter your
six-digit security code instead.
If you forget other codes: If you forget your
security code, SIM PIN code, PIN2 code, or
call barring password, contact your service
provider.

Your phone’s four-digit unlock code is originally set to 1234
or to the last four digits of your phone number.
The six-digit security code is originally set to 000000.
Your service provider may reset these codes before you get
your phone.
If your service provider didn’t change these codes, you
should change them to prevent others from accessing your personal information.
The unlock code must contain four digits. The security code must contain six
digits.To change a code or
password:
Find it: Settings > Security > New Passwords
You can also change your SIM PIN codes or callbarring
password.
Select the type of code you want to change, enter the old
code when prompted, and then enter the new code.If you forget your
unlock code: At the Enter Unlock Code: prompt, try entering 1234 or the
last four digits of your phone number. If that doesn’t work, contact your service
provider.If you forget other
codes: If you forget your security code, SIM PIN code, PIN2 code, or call
barring password, contact your service provider.

if you have your code and need to know how to enter the code , it should be as follows .

Unlock procedure for six digit codes.
Push the "Hr" button, 000 will appear in display. Press the hour button
until you match the first number of your unlock code. For second two
digits of unlock code press the "Min" button until numbers match. When
first three digits of unlock code is entered into display, push the AM/FM
button. Repeat the above process for second set of three numbers of unlock
code.